15e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao/* 25e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * Marvell Wireless LAN device driver: station TX data handling 35e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 45e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * Copyright (C) 2011, Marvell International Ltd. 55e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 65e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * This software file (the "File") is distributed by Marvell International 75e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * Ltd. under the terms of the GNU General Public License Version 2, June 1991 85e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * (the "License"). You may use, redistribute and/or modify this File in 95e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * accordance with the terms and conditions of the License, a copy of which 105e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * is available by writing to the Free Software Foundation, Inc., 115e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the 125e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. 135e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 145e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE 155e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 165e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * ARE EXPRESSLY DISCLAIMED. The License provides additional details about 175e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * this warranty disclaimer. 185e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao */ 195e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 205e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao#include "decl.h" 215e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao#include "ioctl.h" 225e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao#include "util.h" 235e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao#include "fw.h" 245e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao#include "main.h" 255e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao#include "wmm.h" 265e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 275e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao/* 285e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * This function fills the TxPD for tx packets. 295e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 305e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * The Tx buffer received by this function should already have the 315e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * header space allocated for TxPD. 325e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 335e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * This function inserts the TxPD in between interface header and actual 345e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * data and adjusts the buffer pointers accordingly. 355e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 365e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * The following TxPD fields are set by this function, as required - 375e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * - BSS number 385e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * - Tx packet length and offset 395e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * - Priority 405e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * - Packet delay 415e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * - Priority specific Tx control 425e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * - Flags 435e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao */ 445e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhaovoid *mwifiex_process_sta_txpd(struct mwifiex_private *priv, 455e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct sk_buff *skb) 465e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao{ 475e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct mwifiex_adapter *adapter = priv->adapter; 485e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct txpd *local_tx_pd; 495e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); 50e156103cee78a1dd1c0d14efe08aa36fc9285013Yogesh Ashok Powar u8 pad; 515e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 525e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (!skb->len) { 53c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar dev_err(adapter->dev, "Tx: bad packet length: %d\n", skb->len); 54600f5d909a54a8dccf8c8c23898fc2e91bc0953eAmitkumar Karwar tx_info->status_code = -1; 555e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return skb->data; 565e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao } 575e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 58e156103cee78a1dd1c0d14efe08aa36fc9285013Yogesh Ashok Powar /* If skb->data is not aligned; add padding */ 59e156103cee78a1dd1c0d14efe08aa36fc9285013Yogesh Ashok Powar pad = (4 - (((void *)skb->data - NULL) & 0x3)) % 4; 60e156103cee78a1dd1c0d14efe08aa36fc9285013Yogesh Ashok Powar 61e156103cee78a1dd1c0d14efe08aa36fc9285013Yogesh Ashok Powar BUG_ON(skb_headroom(skb) < (sizeof(*local_tx_pd) + INTF_HEADER_LEN 62c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar + pad)); 63e156103cee78a1dd1c0d14efe08aa36fc9285013Yogesh Ashok Powar skb_push(skb, sizeof(*local_tx_pd) + pad); 645e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 655e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd = (struct txpd *) skb->data; 665e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao memset(local_tx_pd, 0, sizeof(struct txpd)); 675e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->bss_num = priv->bss_num; 685e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->bss_type = priv->bss_type; 69c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len - 70c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar (sizeof(struct txpd) 71c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar + pad))); 725e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 735e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->priority = (u8) skb->priority; 745e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->pkt_delay_2ms = 75c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar mwifiex_wmm_compute_drv_pkt_delay(priv, skb); 765e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 775e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (local_tx_pd->priority < 785e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl)) 795e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao /* 805e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * Set the priority specific tx_control field, setting of 0 will 815e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * cause the default value to be used later in this function 825e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao */ 835e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->tx_control = 845e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd-> 85c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar priority]); 865e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 875e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (adapter->pps_uapsd_mode) { 885e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (mwifiex_check_last_packet_indication(priv)) { 895e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao adapter->tx_lock_flag = true; 905e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->flags = 915e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET; 925e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao } 935e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao } 945e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 955e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao /* Offset of actual data */ 96e156103cee78a1dd1c0d14efe08aa36fc9285013Yogesh Ashok Powar local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd) + pad); 975e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 985e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao /* make space for INTF_HEADER_LEN */ 995e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao skb_push(skb, INTF_HEADER_LEN); 1005e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1015e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (!local_tx_pd->tx_control) 1025e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao /* TxCtrl set by user or default */ 1035e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 1045e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1055e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return skb->data; 1065e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao} 1075e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1085e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao/* 1095e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * This function tells firmware to send a NULL data packet. 1105e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * 1115e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * The function creates a NULL data packet with TxPD and sends to the 1125e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * firmware for transmission, with highest priority setting. 1135e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao */ 1145e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhaoint mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags) 1155e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao{ 1165e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct mwifiex_adapter *adapter = priv->adapter; 1175e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct txpd *local_tx_pd; 1185e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao/* sizeof(struct txpd) + Interface specific header */ 1195e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao#define NULL_PACKET_HDR 64 1205e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao u32 data_len = NULL_PACKET_HDR; 121270e58e8898c8be40451ebee45b6c9b5bd5db04bYogesh Ashok Powar struct sk_buff *skb; 122270e58e8898c8be40451ebee45b6c9b5bd5db04bYogesh Ashok Powar int ret; 1235e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct mwifiex_txinfo *tx_info = NULL; 1245e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1255e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (adapter->surprise_removed) 1265e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return -1; 1275e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1285e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (!priv->media_connected) 1295e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return -1; 1305e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1315e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (adapter->data_sent) 1325e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return -1; 1335e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1345e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao skb = dev_alloc_skb(data_len); 1355e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (!skb) 1365e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return -1; 1375e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1385e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao tx_info = MWIFIEX_SKB_TXCB(skb); 1399da9a3b29ba6a9a98e437f24576f13cbe259997bYogesh Ashok Powar tx_info->bss_num = priv->bss_num; 1409da9a3b29ba6a9a98e437f24576f13cbe259997bYogesh Ashok Powar tx_info->bss_type = priv->bss_type; 1415e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao skb_reserve(skb, sizeof(struct txpd) + INTF_HEADER_LEN); 1425e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao skb_push(skb, sizeof(struct txpd)); 1435e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1445e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd = (struct txpd *) skb->data; 1455e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); 1465e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->flags = flags; 1475e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->priority = WMM_HIGHEST_PRIORITY; 1485e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd)); 1495e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->bss_num = priv->bss_num; 1505e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao local_tx_pd->bss_type = priv->bss_type; 1515e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1525e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao skb_push(skb, INTF_HEADER_LEN); 1535e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1545e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, 155d930faee141bd0a6a4873791996c5354c9a85ca7Amitkumar Karwar skb, NULL); 1565e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao switch (ret) { 1575e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao case -EBUSY: 1585e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao adapter->data_sent = true; 1595e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao /* Fall through FAILURE handling */ 1605e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao case -1: 1615e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao dev_kfree_skb_any(skb); 1625e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao dev_err(adapter->dev, "%s: host_to_card failed: ret=%d\n", 163c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar __func__, ret); 1645e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao adapter->dbg.num_tx_host_to_card_failure++; 1655e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao break; 1665e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao case 0: 1675e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao dev_kfree_skb_any(skb); 1685e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao dev_dbg(adapter->dev, "data: %s: host_to_card succeeded\n", 169c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar __func__); 1705e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao adapter->tx_lock_flag = true; 1715e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao break; 1725e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao case -EINPROGRESS: 1735e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao break; 1745e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao default: 1755e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao break; 1765e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao } 1775e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1785e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return ret; 1795e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao} 1805e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1815e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao/* 1825e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao * This function checks if we need to send last packet indication. 1835e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao */ 1845e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhaou8 1855e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhaomwifiex_check_last_packet_indication(struct mwifiex_private *priv) 1865e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao{ 1875e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao struct mwifiex_adapter *adapter = priv->adapter; 1885e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao u8 ret = false; 1895e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 1905e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao if (!adapter->sleep_period.period) 1915e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return ret; 192636c4598499eeacce0893dc8d91113b904bd531eYogesh Ashok Powar if (mwifiex_wmm_lists_empty(adapter)) 1935e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao ret = true; 1945e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao 195c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar if (ret && !adapter->cmd_sent && !adapter->curr_cmd && 196c65a30f35f938b421ac67c34a9e70b0e49e6019aYogesh Ashok Powar !is_command_pending(adapter)) { 1975e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao adapter->delay_null_pkt = false; 1985e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao ret = true; 1995e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao } else { 2005e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao ret = false; 2015e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao adapter->delay_null_pkt = true; 2025e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao } 2035e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao return ret; 2045e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4eBing Zhao} 205